Lawyers for billionaire sex offender Jeffrey Epstein once claimed he co-founded the Clinton Foundation as they touted his relationship with the former president during plea negotiations.

In an attempt to boost Epstein's image before he was sentenced for soliciting an underage girl for prostitution in 2008, his attorneys tried to emphasize his close ties with Bill Clinton, Fox News reports.

A July 2007 letter to the South Florida State U.S. Attorney's office, written by lawyers Alan Dershowitz and Gerald Lefcourt, claimed that Epstein had been part of the original group that set up the Foundation's Clinton Global Initiative, focusing on 'some of the world's most pressing challenges.'

They also mention Clinton was a guest of Epstein who hosted a trip to Africa in 2002 on his private Boeing 727 - dubbed 'Lolita Express' - on behalf of the charity.

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Lawyers for billionaire sex offender Jeffrey Epstein (right) once claimed he co-founded Bill Clinton's (left) Foundation as they touted his close relationship with the former president during plea negotiations

The plea deal negotiations were eventually successful and Epstein ended up serving just 13 months in prison and a year's home detention. He is a registered level three sex offender.

Flight records prove that the former president took dozens of trips on the jet which one woman, who claims to be a victim of Epstein, says was set up with a bed where some guests allegedly had group sex with young girls.

However, his involvement in the Clinton Foundation is less clear.

The former politician has always credited longtime assistant Doug Band, now the director of the Foundation, as coming up with the idea for the Global Initiative.

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Epstein is not listed in any of the official paperwork of the Clinton Global Initiative as either its founder or director.

But there is evidence that the billionaire supported the Clinton Foundation financially.

The International Consortium of Investigative Journalists, reported data from a whistle-blower, that $81 million had been routed from HSBC Swiss accounts to The Clinton Foundation - including money from Epstein.

Epstein, who had various Swiss accounts with HSBC totally $3.5 million, transferred $25,000 to the Foundation in 2006.

A July 2007 letter to the South Florida State U.S. Attorney's office, written by lawyers Alan Dershowitz and Gerald Lefcourt, claimed that Epstein had been part of original group that set up the Foundation's Clinton Global Initiative, focusing on 'some of the world's most pressing challenges'

The letter described Epstein as being part of the original group that set up the Clinton Global Initiative

A July 2007 letter to the South Florida U.S. Attorney's office claimed that Epstein had been part of original group that set up the Clinton Foundation's Clinton Global Initiative

The Foundation has also had its fair share of controversy.

It has raised billions of dollars for charitable works around the world since it was founded in 2001.

The Clinton Global Initiative (CGI) was created as an evolution of the foundation, although no application was made to the IRS.

The goal was to solve world problems and bring together celebrities and powerful people.

While some organizations lavish praise on the Clintons for their philanthropic accomplishments.

However, critics have questioned how much money goes to the causes as they claim the Foundation is used as a 'slush fund' - a secret pool of money used to buy political favors.

Wall Street analyst Charles Ortel, who conducted studies of Clinton Foundation financial reports, alleged that Clinton had 'developed a methodology of exploiting epidemics and natural disasters to raise hundred of millions in "charitable donations" that in a relaxed regulatory environment could be diverted to personal gain, funding Hillary's political campaigns and supporting Democratic Party causes'.

It is not the first time details of Bill Clinton and Jeffrey Epstein's relationship has come to light.

Clinton, 69, spent enough time aboard disgraced the Wall Street mogul's 'Lolita Express' airplane - nicknamed for the film and book Lolita about a professor falling in love with a 14-year-old that he should be eligible for frequent flyer miles, according to flight logs obtained by Fox News.

The lawyers also mention Clinton was a guest of Epstein who hosted a trip to Africa in 2002 on his private Boeing 727 - dubbed 'Lolita Express' (pictured)

INTO AFRICA: This was the flight from New York's JFK airport to the Azores which began a tour of Africa for Bill Clinton, Kevin Spacey and others on board Epstein's private jet. He was not then a convicted pedophile

ANOTHER TRIP: Bill Clinton, Naomi Campbell and key Clinton aide Doug Band were on board Epstein's private Boeing 727 as it flew from London Luton airport to JFK

The logs show Clinton took 26 trips aboard Epstein's Boeing 727 jet, more than double the 11 flights previously known.

The disgraced financier's jet was reportedly set up with a bed where guests had group sex with young girls according to claims by Virginia Roberts.

Roberts alleged in a sworn affidavit in Florida in January 2015, seen by the Guardian, that she was lured into joining Epstein's harem when she was just 15 years old.

The former teen prostitute has said she was used as a 'sex slave' and lent out to friends of the financier.

The court document was part of a lawsuit filed by two other alleged victims of the financier to reopen Epstein's non-prosecution agreement. A judge later ordered that it should be struck from the record.

On February 6, 2008, an anonymous Virginia woman filed a $50 million civil lawsuit in federal court that she was 'recruited' aged 16 to give him a massage. She was taken to his mansion where he had sex with her and paid her $200, it alleged.

Another woman filed a similar lawsuit later that year.

Many of the lawsuits have been dismissed while the others have been settled out of court. So far, Epstein has made 17 out of court settlements.

Roberts claimed in her court filing that she saw Clinton in 2002 on an Epstein junket to St. Thomas in the U.S. Virgin Islands, NY Daily News reported.

But according to Fox, flight logs don't show the former president aboard a flight headed there. St. Thomas has a landing strip long enough to accommodate the jet.

The logs do show the former president jetting to such exotic locales as Brunei, Norway, Russia, Singapore, Hong Kong, Japan, the Azores, Africa, Belgium, China, New York, and Belgium – all on Epstein's plane.

The Foundation has also had its fair share of controversy. It has raised billions of dollars for charitable works around the world since it was founded in 2001 by Bill Clinton (pictured with wife Hillary)

They include the 2002 Africa trip for the Clinton Global Initiative, which Clinton attended, along with celebrities such as actor Kevin Spacey and comedian Chris Tucker for a purported anti-AIDS mission.

Dershowitz and Lefcourt wrote in their letter that Clinton had come away from the trip with a positive opinion of Epstein.

'In a feature article about Mr. Epstein in New Yorker magazine, former President Clinton aptly described Mr. Epstein as a 'committed philanthropist with a keen sense of global markets and an in-depth knowledge of 21st century science'.

'President Clinton reached this conclusion during a month-long trip to Africa with Mr. Epstein, which Mr. Epstein hosted. The purpose of that trip was to increase AIDS awareness; to work toward a solution to the AIDS crisis; and to provide funding to reduce the costs of delivering medications to those inflicted with the disease.'

Often traveling with Epstein on the jet was New York socialite Ghislaine Maxwell, whom Roberts has accused of pimping her out.

Flight logs filed with the Federal Aviation Administration show Clinton brought as many as 10 U.S. Secret Service agents along with him on some trips.

But a journey to Asia in 2002 didn't list any Secret Service protection. As a former president, Clinton still gets a taxpayer-funded security detail for life.

Epstein was arrested (pictured is his mugshot) and sentenced for soliciting an underage girl for prostitution in 2008

Epstein's sexual exploits have been documented since 2005, when a woman in Palm Beach contacted police saying that her 14-year-old daughter had been paid $300 to massage him and then have sex.

The claim prompted a nearly year-long investigation that led to the eventual charge of soliciting prostitution which came as part of a plea deal.

Epstein pleaded guilty to soliciting a minor for prostitution in 2008, and served just 18 months in jail for the offense despite outrage from victims advocates.

Several of his famous friends cut ties - including Clinton and then-New York Governor Eliot Spitzer who returned his campaign donations - but not all of them.

Prince Andrew reportedly stayed at Epstein's mansion in New York in 2010, months after he was released from jail.

The Palm Beach, Florida police and the FBI investigated charges that Epstein consorted with underage girls used for prostitution.

Court documents show that police found a 'clear indication that Epstein's staff was frequently working to schedule multiple young girls between the ages of 12 and 16 years old literally every day, often two or three times per day.'

One victim said under oath that Epstein molested her at least 50 times, beginning when she was 13.

She said she and other girls were lured to Epstein's home with promises of hundreds of dollars for modeling or for massaging him.

But once they were at his house, she said, Epstein ordered them to disrobe and massage his naked body – while he masturbated and abused them with sex toys.